The US State Department posted a press release on 27 March 2020 titled "The United States Is Leading the Humanitarian and Health Assistance Response to COVID-19."
As China ramps up its public relations campaign to demonstrate how it is supporting countries to deal with coronavirus, the United States is trying to make clear that it is providing more aid to combat coronavirus than any other country (read China). The United States has provided assistance to the following countries in Africa: Angola, Burkina Faso, Cameroon, Cote d'Ivoire, Ethiopia, Kenya, Libya, Morocco, Mozambique, Nigeria, Rwanda, Senegal, South Africa, Tanzania, Tunisia, Zambia, and Zimbabwe. It is providing additional health assistance to the Central African Republic, DRC, Somalia, South Sudan, and Sudan.
Unfortunately, China's smaller effort to aid countries in Africa has resulted in far more effective messaging than that from the United States.